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Electromagnetic Field Theory

Electromagnetic Field Theory
In a dielectric material an applied field in x direction Ex = 5 v/m gives a polarization of px = 3/10π ux nc/m2. The susceptibility of the material is

 Zero.
  2.16.
 Infinity.
 4.32.

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Electromagnetic Field Theory
The minimum height of outer atmosphere is

150 km
200 km
400 km
100 km

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Electromagnetic Field Theory
Which of the following will increase the antenna radiation efficiency?

Top loading of antenna
Use of larger section of conductor
Any of the above
Providing insulation on conductor

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Electromagnetic Field Theory
A point pole has a strength of 4π × 10-4 weber. The force in newtons on a point pole of 4π × 1.5 × 10-4 weber placed at a distance of 10 cm from it will be

 20 N.
 3.75 N.
 7.5 N.
 15 N.

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Electromagnetic Field Theory
Skin depth is proportional to

 1/√σ.
 Frequency.
 √(σ).
 Permeability.

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Electromagnetic Field Theory
The electric field on a plane is decribed by . The field due to

 none of above.
 a monopole.
 a dipole and a monopole.
 a dipole.

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MORE MCQ ON Electromagnetic Field Theory

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